/*
 * Melody played when motion detected
 * Clayton Walker
 */
#include "pitches.h"

int ledPin = 13;
int pirPin = 3;

// notes in the melody:
int melody[] = {
  NOTE_C4, NOTE_G3, NOTE_G3, NOTE_A3, NOTE_G3, 0, NOTE_B3, NOTE_C4
};

// note durations: 4 = quarter note, 8 = eighth note, etc.:
int noteDurations[] = {
  4, 8, 8, 4, 4, 4, 4, 4
};

void setup() {
  //setup pin modes
  pinMode(ledPin, OUTPUT);
  pinMode(pirPin, INPUT);

  delay(3000);
}

void loop() {
  int val = digitalRead(pirPin);
  
  if(val == HIGH){
    digitalWrite(ledPin, HIGH);

    // iterate over the notes of the melody:
    for (int thisNote = 0; thisNote < 8; thisNote++) {
  
      // to calculate the note duration, take one second
      // divided by the note type.
      //e.g. quarter note = 1000 / 4, eighth note = 1000/8, etc.
      int noteDuration = 1000 / noteDurations[thisNote];
      tone(8, melody[thisNote], noteDuration);
  
      // to distinguish the notes, set a minimum time between them.
      // the note's duration + 30% seems to work well:
      int pauseBetweenNotes = noteDuration * 1.30;
      delay(pauseBetweenNotes);
      // stop the tone playing:
      noTone(8);
    }
  }
  else {
    digitalWrite(ledPin, LOW);
  }
}
